Which components are part of the conduction system of the heart?

The conduction system of the heart is crucial for maintaining a coordinated and effective heartbeat. It consists of specialized cardiac muscle cells that generate and conduct electrical impulses throughout the heart. The correct response, which includes the Purkinje fibers and the Bundle of His, accurately identifies two key components of this system.

The Bundle of His, also known as the atrioventricular bundle, conducts impulses from the atrioventricular node to the ventricles. These impulses then spread through the Purkinje fibers, which further distribute the electrical signals throughout the ventricular myocardium, causing the ventricles to contract in a synchronized manner. This ensures that the heart can effectively pump blood to the lungs and the rest of the body.

The other choices encompass structures that are not part of the conduction system. The coronary sinus and valves are involved in the heart's blood supply and mechanics but do not play a role in the conduction of electrical impulses. The atria and ventricles are heart chambers involved in blood flow but do not function as part of the conduction system themselves. The aorta and pulmonary artery are major blood vessels that carry blood away from the heart but again do not pertain to the conduction pathways within the heart.